GB462264A - Improvements in or relating to controllers for electric circuits - Google Patents

Improvements in or relating to controllers for electric circuits

Info

Publication number
GB462264A
GB462264A GB10249/36A GB1024936A GB462264A GB 462264 A GB462264 A GB 462264A GB 10249/36 A GB10249/36 A GB 10249/36A GB 1024936 A GB1024936 A GB 1024936A GB 462264 A GB462264 A GB 462264A
Authority
GB
United Kingdom
Prior art keywords
coil
circuit
contacts
contactor
delay
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB10249/36A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cutler Hammer Europe Ltd
Original Assignee
Igranic Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Igranic Electric Co Ltd filed Critical Igranic Electric Co Ltd
Publication of GB462264A publication Critical patent/GB462264A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00Resistance welding; Severing by resistance heating
    • B23K11/24Electric supply or control circuits therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Relay Circuits (AREA)

Abstract

462,264. Electromagnetic switches. IGRANIC ELECTRIC CO., Ltd. April 7, 1936, No. 10249. Convention date, May 2, 1935. [Class 38 (v)] [Also in Group XXXV] An electric circuit control system, which may be employed in conjunction with electric welders, has means to effect the energization of the controlled circuit and a power-operated device rendered operative each time the controlled circuit is energized to effect de-energization thereof subject to a delay, said device having an operating winding and a restraining winding and said delay being caused by the electrical inertia inherent in the circuit of one of said windings. As shown in Fig. 1 applied to an electric welding plant depression of a push-button 7 energizes a main contactor 6 through contacts 10, 11 of a time lag relay 8. The main contacts of the contactor 6 complete the circuit to the primary winding 4 of a welding transformer 3, and the auxiliary contacts 6<a> complete a maintaining circuit for the contactor, this maintaining circuit including the contacts 10, 11 of the relay 8. The latter comprises a pivoted armature 9 subjected to the opposing forces of an operating coil 12 and a restraining coil 13. The coil 13 is normally connected across the supply lines L<1>, L<2> in series with a rectifier bridge 16 .. 19, the current through this coil passing through coils 6 and 12 in parallel but being insufficient to attract their controlled armatures. On depression of push-button 7 and closing of contactor 6, however, the coil 13 and rectifier bridge are shortcircuited both by the push-button and the contacts 6<a> so that the coil is de-energized and by virtue of its inductance commences to discharge through the resistance 22 and the rectifier bridge. Thus after a predetermined time delay the energization of the coil 13 falls to such a value that the energized operating coil 12 overcomes it and attracts the armature 9 breaking the maintaining circuit of the contactor 6 at contacts 10, 11. In modified arrangements the time-delay of operation may be modified by the value of the welding current by the addition of a coil in the time-lag relay which is either directly in or inductively coupled to, the welding transformer circuit.
GB10249/36A 1935-05-02 1936-04-07 Improvements in or relating to controllers for electric circuits Expired GB462264A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US462264XA 1935-05-02 1935-05-02

Publications (1)

Publication Number Publication Date
GB462264A true GB462264A (en) 1937-03-05

Family

ID=21942284

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10249/36A Expired GB462264A (en) 1935-05-02 1936-04-07 Improvements in or relating to controllers for electric circuits

Country Status (1)

Country Link
GB (1) GB462264A (en)

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